DECIDUITIS 



208 



DEGENERATION 



Deciduitis (de-sid-u-i'-tis). Inflammation of the decid- 

 ual membranes of the gravid uterus. 



Deciduoma. (See Illus. Diet.) D. malignum, a 

 variety of uterine sarcoma first described by Sanger, 

 which in its microscopic characters strongly resembles 

 decidual tissue. Syn., Sarcoma deeiduo-cellulare ; 

 Syncytioma malignum; Chorioepithelioma malignum. 



Deciduosarcoma (de-sid-u-o-sar-hd '-man). See De- 

 ciduoma malignum. 



Decipara (de-sip' -ar-ah) [decern, ten; parere, to bring 

 forth]. A woman pregnant for the tenth time. 



Decipium (de-sip' -e-um) [L.]. A metallic element de- 

 scribed by Delafontain as occurring in North Carolina 

 samarskite and as being allied to the cerium and 

 yttrium groups. 



Declive (de-hfiz/) [declivis, sloping]. I. A lower or 

 descending part. 2. See Declivis cerebelli (Illus. 

 Diet.). 



Decolorant (de-hul'-or-ant) [de, priv.; color~\. An 

 agent for the altering or removal of color. 



Decombustion (de-kom-bust'-yun). See Deoxygena- 

 tion. 



Decompensation (de-kompen-sa'-shun) [de, priv.; 

 compensare, to compensate]. Failure of compensation 

 (as of the circulation, or of the heart). 



Decomposability (de-kom-po-za-bil'-it-e) [de, from; 

 componere, to compose]. Capability of being decom- 

 posed. 



Decompose (de-kom-poz'). I. To cause a compound 

 to break up into its simpler constituents. 2. To un- 

 dergo putrefaction. 



Decompression (de-kom-presh'-on). The removal of 

 compression or pressure. 



Decostate (de-kos'-tdt) [de, from; costa, a rib]. With- 

 out ribs. 



Decrement (dek f -re-ment). See Decline (Illus. 

 Diet.). 



Decrustation (dekrust-a f -shun) \_de, from; crusta, a 

 crust]. The detachment of a crust. 



Decubital (de-ku'-bit-al). Relating to a decubitus or 

 to a bed-sore. 



Decubitus. (See Illus. Diet.) D., Andral's. See 

 under Signs. 



Decurtation [de-kur-ta'-shun) [decurtare, to curtail]. 

 The ablation or shortening of a structure or usual dura- 

 tion of a condition. 



Decurvature (de-hurv' '-a-chur) [decurvatus, bent back]. 

 A descending curvature. 



Decussation. (See Illus. Diet.) D., Forel's, the 

 ventral tegmental decussation. D., Fountain, Spitz- 

 ka's term for such a decussation of nerve-fibers as is 

 seen in the cortex of the anterior quadrigeminum. D., 

 Fountain-like, D., Fountain-like Tegmental. See 

 D. , Tegmental, of Meynert. D., Inferior. See under 

 Meynert (Illus. Diet.). D., Motor. See D. of the 

 Pyramids. D.of the Optic Nerve, the chiasm. D., 

 Pineal, Spitzka's term for the crossing of certain 

 fibers of the inner division of the reticular formation. 

 D., Piniform. See D. of the Pyramids, Sensory. D., 

 Pyramidal, Superior, D., Pyramidal, Upper. See 

 D. of the Pyramids, Sensory. D. of the Pyramids, 

 D., Pyramidal, the oblique crossing of the tmndlea 

 of the anterior pyramids of the oblongata from opposite 

 sides of the median fissure. Syn., ))., Inferior: D., 

 Motor; D., Piniform; D., Ventral, of the pyra- 

 mids. D. of the Pyramids, Sensory, a crossing of 

 certain fibers having their origin in the funiculi cuneafi 

 of the spinal cord, which occurs in the upper part of the 

 oblongata, between the anterior pyramids and the gray 

 floor of the fourth ventricle. Syn., D., Interolivarv ; 

 D., Pyramidal Posterior ; D. of the Fillet. D. of the 

 Pyramids, Ventral. See D. of the Pyramids. D., 



Sensory. I. See D. of the Pyramids, Sensory. 2. The 

 crossing of the outer bundles of the anterior pyramids 

 of the spinal cord. [Meynert.] Syn., D., Superior. 

 D., Sensory, Middle, a crossing in the median line 

 of certain fibers between the upper and lower pyra- 

 mids described-by Huguenin. D., Tegmental, of 

 Meynert, the crossing of the fibers in the cortex of the 

 anterior quadrigeminum. 



Decyl (de'-sil). A monatomic radicle. D.hydrid. 

 See Decane (Illus. Diet.). 



Dedaleum, Daedaleum {ded-a'-le-um) [daitia/.eor, cu- 

 riously wrought]. A form of anorthoscope devised by 

 W. G. Horner; it resembles the discs of Uchatius and 

 J. M idler. Cf. Stroboscope, Reverse. 



Dedalous, Daedalous (ded'-al-us) [daidcueoq, curiously 

 wrought]. Labyri nth i form ; intricately wrought. 



Dedalum, Daedalum (ded'-al-um). See Dedaleum. 



Defecation. (See Illus. Diet. ) 2. Clarification, as of 

 wine. Cf. Decantation. 



Defensive (de-fens' '-iv) . See Prophylactic and Pro- 

 tective (Illus. Diet.). 



Deferentectomy (defur-ent-ek' -to-me). Excision of 

 the vas deferens. 



Deferential (defur-en'-shal). Pertaining to the vas 

 deferens. 



Deferentiovesical (defur-en-she-o-ves'-ik-al). Per- 

 taining to both the vas deferens and the bladder. 



Defiguration (de fig-u-raf -shun). See Deformation 

 (Illus. Diet.). 



Defining Power (de-fi'-ning po~w'-ur). See Definition 

 (Illus. Diet.). 



Deflagrator (defla-gra'-tur) [deftagrare, to burn 

 down]. An apparatus for producing very rapid com- 

 bustion. D., Hare's. See Battery, Hare'' ' s. 



Deformity. (See Illus. Diet.) D., Sprengel's, con- 

 genital upward displacement of one of the scapulas. 

 D., Volkmann's, congenital tibiotarsal dislocation. 



Defurfuration (de-fur-fur- a' -shun) [de, from ; furfur, 

 bran]. Desquamation. 



Defuselation (de-fu-sel-a' -shun). The removal of fusel 

 oil from spirits. 



Defusion (de-fu' -shun). See Decantation (Illus. 

 Diet.). 



Degenerate (de-Jen' '-ur-at) [degenerare, to differ from 

 ancestors]. I. To revert to a lower type. 2. An 

 individual who has reverted to a lower type. 



Degeneration. (See Illus. Diet.) Syn., Degener- 

 escetice. D., Abercrombie's, amyloid degeneration. 

 D., Acute Fatty. I. See Foot-halt of Colts. 2. See 

 Acute Yellow Atrophy of the Liver, under Icterus 

 (Illus. Diet.). D., Adipose. See D., Fatty (Illus, 

 Diet.). D., Albuminous, albuminous infiltration. D., 

 Armanni-Ehrlich's, hyaline degeneration of the epi- 

 thelial cells of Henle's looped tubes in diabetes. D., 

 Bacony, D., Bacon-like. See D., Amyloid (Illus. 

 Diet.). D., Cellulose. See D., Amyloid { Illus. Did. ). 

 D., Cheesy. See Caseation (Illus. Diet.). D.,Chitin- 

 ous. See D., Amyloid (Illus. Diet.). D., Choles- 

 terin, according to Meckel, the same as waxy degen- 

 eration. See Albuminoid Disease (Illus. Diet.). D., 

 Cystic, degeneration with cyst-formation. D., Cyst- 

 oid, of the Retina, round or oval cystoid spaces sur 

 rounded by hypertrophied radial libers found in the re( 

 ina at all ages, as described by Iwanoff. D., Earthy. 

 See Calcification and D., Calcareous (Illus. Diet.). D., 

 Fascicular, that form of atrophy of paralyzed mus- 

 cles following pathologic change in the motor 

 ganglion cells of the central tube of the gray mailer 

 of the spinal cord or their efferent fibers. D., 

 Fibro-fatty, of the Placenta, an association <>t fattj 

 degeneration of the placenta with fibromatous degen- 

 eration of the chorionic villi and of the decidua ser- 



